Nissan Maxima. Manual — part 415

EC-144

< SYSTEM DESCRIPTION >

[VQ35DE]

DIAGNOSIS SYSTEM (ECM)

EVAP DIAG READY

ON/OFF

• Indicates the ready condition of EVAP leak diag-

nosis.

- ON: Diagnosis has been ready condition.
- OFF: Diagnosis has not been ready condition.

A/F SEN1 DIAG1
(B1)

INCMP/CM-

PLT

• Indicates DTC P015A or P015B self-diagnosis

condition.
INCMP: Self-diagnosis is incomplete.
CMPLT: Self-diagnosis is complete.

A/F SEN1 DIAG1
(B2)

INCMP/CM-

PLT

• Indicates DTC P015C or P015D self-diagnosis

condition.
INCMP: Self-diagnosis is incomplete.
CMPLT: Self-diagnosis is complete.

A/F SEN1 DIAG2
(B1)

INCMP/CM-

PLT

• Indicates DTC P014C or P014D self-diagnosis

condition.
INCMP: Self-diagnosis is incomplete.
CMPLT: Self-diagnosis is complete.

A/F SEN1 DIAG2
(B2)

INCMP/CM-

PLT

• Indicates DTC P014E or P014F self-diagnosis

condition.
INCMP: Self-diagnosis is incomplete.
CMPLT: Self-diagnosis is complete.

A/F SEN1 DIAG3
(B1)

ABSNT/

PRSNT

• Indicates DTC P014C, P014D, P015A or P015B

self-diagnosis condition.
ABSNT: The vehicle condition is not within the di-
agnosis range.
PRSNT: The vehicle condition is within the diag-
nosis range.

A/F SEN1 DIAG3
(B2)

ABSNT/

PRSNT

• Indicates DTC P014C, P014D, P015A or P015B

self-diagnosis condition.
ABSNT: The vehicle condition is not within the di-
agnosis range.
PRSNT: The vehicle condition is within the diag-
nosis range.

HO2 S2 DIAG1(B1)

INCMP/CM-

PLT

• Indicates DTC P0139 self-diagnosis (delayed re-

sponce) condition.
INCMP: Self-diagnosis is incomplete.
CMPLT: Self-diagnosis is complete.

HO2 S2 DIAG1(B2)

INCMP/CM-

PLT

• Indicates DTC P0159 self-diagnosis (delayed re-

sponce) condition.
INCMP: Self-diagnosis is incomplete.
CMPLT: Self-diagnosis is complete.

HO2 S2 DIAG2(B1)

INCMP/CM-

PLT

• Indicates DTC P0139 self-diagnosis (slow re-

sponce) condition.
INCMP: Self-diagnosis is incomplete.
CMPLT: Self-diagnosis is complete.

HO2 S2 DIAG2(B2)

INCMP/CM-

PLT

• Indicates DTC P0159 self-diagnosis (slow re-

sponce) condition.
INCMP: Self-diagnosis is incomplete.
CMPLT: Self-diagnosis is complete.

A/F-S ATMSPHRC
CRCT B1

—

Displays a determined value of atmospheric correc-
tion factor necessary for correcting an A/F sensor
signal input to ECM. The signal used for the correc-
tion is an A/F sensor signal transmitted while driving
under atmospheric pressure.

A/F-S ATMSPHRC
CRCT B2

—

Displays a determined value of atmospheric correc-
tion factor necessary for correcting an A/F sensor
signal input to ECM. The signal used for the correc-
tion is an A/F sensor signal transmitted while driving
under atmospheric pressure.

Monitored item

Unit

Description

Remarks

DIAGNOSIS SYSTEM (ECM)

EC-145

< SYSTEM DESCRIPTION >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

*: The item is indicated, but not used.

NOTE:

Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.

WORK SUPPORT MODE

Work Item

*: This function is not necessary in the usual service procedure.

ACTIVE TEST MODE

Test Item

A/F-S ATMSPHRC
CRCT UP B1

count

Displays the number of updates of the A/F sensor
atmospheric correction factor.

A/F-S ATMSPHRC
CRCT UP B2

count

Displays the number of updates of the A/F sensor
atmospheric correction factor.

Monitored item

Unit

Description

Remarks

WORK ITEM

CONDITION

USAGE

FUEL PRESSURE RELEASE

• FUEL PUMP WILL STOP BY TOUCHING “START” DUR-

ING IDLING.
CRANK A FEW TIMES AFTER ENGINE STALLS.

When releasing fuel pressure from
fuel line

IDLE AIR VOL LEARN

• THE IDLE AIR VOLUME THAT KEEPS THE ENGINE

WITHIN THE SPECIFIED RANGE IS MEMORIZED IN
ECM.

When learning the idle air volume

SELF-LEARNING CONT

• THE COEFFICIENT OF SELF-LEARNING CONTROL

MIXTURE RATIO RETURNS TO THE ORIGINAL COEF-
FICIENT.

When clearing mixture ratio self-
learning value

EXH V/T CONTROL LEARN

• IN THIS MODE, OPERATION TO LEARN EXHAUST

VALVE TIMING CONTROL MAGNET RETARDER CHAR-
ACTERISTIC.

When learning the exhaust valve
timing control

EVAP SYSTEM CLOSE

CLOSE THE EVAP CANISTER VENT CONTROL VALVE IN
ORDER TO MAKE EVAP SYSTEM CLOSE UNDER THE
FOLLOWING CONDITIONS.
• IGN SW ON
• ENGINE NOT RUNNING
• AMBIENT TEMPERATURE IS ABOVE 0

°C (32°F).

• NO VACUUM AND NO HIGH PRESSURE IN EVAP SYS-

TEM

• FUEL TANK TEMP. IS MORE THAN 0

°C (32°F).

• WITHIN 10 MINUTES AFTER STARTING “EVAP SYS-

TEM CLOSE”

• WHEN TRYING TO EXECUTE “EVAP SYSTEM CLOSE”

UNDER THE CONDITION EXCEPT ABOVE, CONSULT
WILL DISCONTINUE IT AND DISPLAY APPROPRIATE
INSTRUCTION.
NOTE:
WHEN STARTING ENGINE, CONSULT MAY DISPLAY
“BATTERY VOLTAGE IS LOW. CHARGE BATTERY”,
EVEN WHEN IN USING A CHARGED BATTERY.

When detecting EVAP vapor leak-
age in the EVAP system

VIN REGISTRATION

• IN THIS MODE, VIN IS REGISTERED IN ECM.

When registering VIN in ECM

TARGET IDLE RPM ADJ*

• IDLE CONDITION

When setting target idle speed

TARGET IGN TIM ADJ*

• IDLE CONDITION

When adjusting target ignition tim-
ing

CLSD THL POS LEARN

• IGNITION ON AND ENGINE STOPPED.

When learning the throttle valve
closed position

SAVING DATA FOR REPLC CPU

• In this mode, save data that is in ECM.

When ECM is replaced.

WRITING DATA FOR REPLC CPU

• In this mode, write data stored by “SAVE DATA FOR CPU

REPLC” in work support mode to ECM.

When ECM is replaced.

EC-146

< SYSTEM DESCRIPTION >

[VQ35DE]

DIAGNOSIS SYSTEM (ECM)

TEST ITEM

CONDITION

JUDGMENT

CHECK ITEM (REMEDY)

FUEL INJEC-
TION

• Engine: Return to the original

trouble condition

• Change the amount of fuel injec-

tion using CONSULT.

If trouble symptom disappears, see
CHECK ITEM.

• Harness and connectors
• Fuel injector
• Air fuel ratio (A/F) sensor 1

IGNITION TIM-
ING

• Engine: Return to the original

trouble condition

• Timing light: Set
• Retard the ignition timing using

CONSULT.

If trouble symptom disappears, see
CHECK ITEM.

• Perform Idle Air Volume Learning.

POWER BAL-
ANCE

• Engine: After warming up, idle the

engine.

• A/C switch OFF
• Selector lever: P or N
• Cut off each injector signal one at

a time using CONSULT.

Engine runs rough or stops.

• Harness and connectors
• Compression
• Fuel injector
• Power transistor
• Spark plug
• Ignition coil

COOLING FAN*

• Ignition switch: ON
• Turn the cooling fan “HI”, “MID”,

“LOW” and “OFF” using CON-
SULT.

Cooling fan moves and stops.

• Harness and connectors
• Cooling fan motor
• IPDM E/R

ENG COOLANT
TEMP

• Engine: Return to the original

trouble condition

• Change the engine coolant tem-

perature using CONSULT.

If trouble symptom disappears, see
CHECK ITEM.

• Harness and connectors
• Engine coolant temperature sen-

sor

• Fuel injector

FUEL PUMP RE-
LAY

• Ignition switch: ON (Engine

stopped)

• Turn the fuel pump relay “ON”

and “OFF” using CONSULT and
listen to operating sound.

Fuel pump relay makes the operat-
ing sound.

• Harness and connectors
• Fuel pump relay

VIAS S/V-1

• Ignition switch: ON
• Turn solenoid valve “ON” and

“OFF” using CONSULT and listen
to operating sound.

Solenoid valve makes the operating
sound.

• Harness and connectors
• Solenoid valve

VIAS S/V-2

• Ignition switch: ON
• Turn solenoid valve “ON” and

“OFF” using CONSULT and listen
to operating sound.

Solenoid valve makes the operating
sound.

• Harness and connectors
• Solenoid valve

ENGINE
MOUNTING

• Ignition switch: ON
• Turn electronic controlled engine

mount “IDLE” and “TRVL” with
CONSULT.

Electronic controlled engine mount
makes the operating sound.

• Harness and connectors
• Electronic controlled engine mount

PURG VOL
CONT/V

• Engine: After warming up, run en-

gine at 1,500 rpm.

• Change the EVAP canister purge

volume control solenoid valve
opening percent using CON-
SULT.

Engine speed changes according to
the opening percent.

• Harness and connectors
• Solenoid valve

FUEL/T TEMP
SEN

• Change the fuel tank temperature using CONSULT.

VENT CON-
TROL/V

• Ignition switch: ON (Engine

stopped)

• Turn solenoid valve “ON” and

“OFF” with the CONSULT and lis-
ten to operating sound.

Solenoid valve makes an operating
sound.

• Harness and connectors
• Solenoid valve

INT V/T ASSIGN
ANGLE

• Engine: Return to the original

non-standard condition

• Change intake valve timing using

CONSULT.

If malfunctioning symptom disap-
pears, see CHECK ITEM.

• Harness and connectors
• Intake valve timing control sole-

noid valve

DIAGNOSIS SYSTEM (ECM)

EC-147

< SYSTEM DESCRIPTION >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

*: Leaving cooling fan OFF with CONSULT while engine is running may cause the engine to overheat.

DTC WORK SUPPORT MODE

Test Item

*: DTC P1442 and P1456 does not apply to this model but appears in DTC Work Support Mode screens.

SRT & P-DTC MODE

SRT STATUS Mode

• For items whose SRT codes are set, “CMPLT” is displayed on the CONSULT screen; for items whose SRT

codes are not set, “INCMP” is displayed.

• “SRT STATUS” provides the presence or absence of permanent DTCs stored in ECM memory.

PERMANENT DTC STATUS Mode

How to display permanent DTC status

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

4. Turn ignition switch ON.

5. Select “PERMANENT DTC STATUS” in “DTC & SRT CONFIRMATION” mode with CONSULT.

NOTE:

Permanent DTCs stored in ECM memory are displayed on the CONSULT screen to show if a driving pat-

tern required for erasing permanent DTCs is complete (CMPLT) or incomplete (INCMP).

CAUTION:

EXH V/T ASSIGN
ANGLE

• Engine: Return to the original

non-standard condition

• Change exhaust valve timing us-

ing CONSULT.

If malfunctioning symptom disap-
pears, see CHECK ITEM.

• Harness and connectors
• Exhaust valve timing control mag-

net retarder

ALTERNATOR
DUTY

• Engine: Idle
• Change duty ratio using CON-

SULT.

Battery voltage changes.

• Harness and connectors
• IPDM E/R
• Alternator

TEST ITEM

CONDITION

JUDGMENT

CHECK ITEM (REMEDY)

Test mode

Test item

Corresponding DTC No.

Reference page

EVAPORATIVE SYSTEM

EVP V/S LEAK P0456/P1456*

P0442

EC-316

P0455

EC-358

P0456

EC-364

PURG VOL CN/V P1444

P0443

EC-323

PURG FLOW P0441

P0441

EC-310

A/F SEN1

A/F SEN1(B1) P1278/P1279

—

—

A/F SEN1(B1) P1276

P0130

EC-218

A/F SEN1(B2) P1288/P1289

—

—

A/F SEN1(B2) P1286

P0150

EC-218

HO2S2

HO2S2(B1) P1146

P0138

EC-237

HO2S2(B1) P1147

P0137

EC-230

HO2S2(B1) P0139

P0139

EC-247

HO2S2(B2) P1166

P0158

EC-237

HO2S2(B2) P1167

P0157

EC-230

HO2S2(B2) P0159

P0159

EC-247